"Abdullah has divorced his wife while she was menstruating." He said: "Tell 'Abdullah to take her back, then leave her until she becomes pure from this menstrual period, then menstruates again, then when she becomes pure again, if he wishes he may separate from her before having intercourse with her, or if he wishes he may keep her. This is the time when Allah, the Mighty and Sublime, has stated that women may be divorced."
أَنَّهُ طَلَّقَ امْرَأَتَهُ وَهِيَ حَائِضٌ فَاسْتَفْتَى عُمَرُ رَسُولَ اللَّهِ ﷺ فَقَالَ إِنَّ عَبْدَ اللَّهِ طَلَّقَ امْرَأَتَهُ وَهِيَ حَائِضٌ فَقَالَ مُرْ عَبْدَ اللَّهِ فَلْيُرَاجِعْهَا ثُمَّ يَدَعْهَا حَتَّى تَطْهُرَ مِنْ حَيْضَتِهَا هَذِهِ ثُمَّ تَحِيضَ حَيْضَةً أُخْرَى فَإِذَا طَهُرَتْ فَإِنْ شَاءَ فَلْيُفَارِقْهَا قَبْلَ أَنْ يُجَامِعَهَا وَإِنْ شَاءَ فَلْيُمْسِكْهَا فَإِنَّهَا الْعِدَّةُ الَّتِي أَمَرَ اللَّهُ ﷻ أَنْ تُطَلَّقَ لَهَا النِّسَاءُ